Marking device for watchmen&#39;s clocks.



PATENTED JUNE 2,- 1908. A. A. NEWMAN.

MARKING DEVICE FOR. WATGHMENS CLOCKS. 4

APPLIGATIOI rmzn mm 4 1900 ABRAHAM A. NEWMAN, OF CHICAGO, ILLINOIS.

MARKING DEVICE FOR WATCIDVIENS CLOCKS.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed December 4, 1906. Serial No. 846,274.

To all whom it may concern:

Be it known that I, ABRAHAM A. NEWMAN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Marking Devices for WatchmensClocks, of which the following is a specification.

My invention relates to improvements in marking device for watchmansclock, and is fully described and explained in this specification andshown in the accompanying drawings, in which Figure 1 is a sideelevation of a watchmans clock embodying my improved device, the casingof the ,clock being broken away to show my device; Fig. 2 is a top planof the clock, the casing being broken away to show the interior of thestructure; and Fig. 3 is a perspective view showing certain portions ofmy device in detail.

Referring to the drawings, A, is a suitable case which contains aclock-movcment of any ordinary form, which clock-movement drives a dialcarrying spindle, B. Inasmuch as the clock-movement can be of anywell-known form and as such movements are used in all watchmens clocks,I have not shown the same in the accompanying drawings, it having norelation to my invention except so far as it constitutes one of theportions of an operative watchmans clock. The spindle, B, carries adial, 0, (Fig. 1) above which is mounted a matrix, D, having engravedupon it in reverse type a series of characters here shown as a series ofnumer als, said matrix forming one portion of the registering device.This matrix can be supported in any suitableway within the case, A, itbeing common practice to mount it on the lower side of a crescent-shapedsupporting member, E, sufficient space being left between the matrix anda plate, F, to permit the ready insertion of the paper-dial, C. Theplate, F, is provided behind the series of numerals in the matrix with aslot, f, through which slot the bit, 9, of a key, G, can pass. This key,G, comprises a tubular shank, 9 a flat web, 9 projecting therefrom, andthe bit, 9, which projects from this web between its ends, asillustrated, leaving a projecting lip or flange, 9 as illustrated.

H, indicates a click-spring formed of flat spring metal, one end ofwhich, 7L, is secured to the lower surface of the plate, F. This springis carried. from its point of attachment to the plate in a large curve,7L1, first downwhen the shank of the key is passed over a pin, f adaptedto receive it, the lip or flange, 9 which extends beyond the bit of thekey will engage with it as the key is rotated. The plate, F, carries abackwardly projecting pin',f adapted to enter a depression, 9 in theflat web, 9 of the key.

It will be understood that the clock herein shown is of the type carriedabout from place .to place by the watchman, the keys being stationarilysecured in place at the various stations which he visits and each keyhaving upon its bit the character adapted to engage or register with oneof the engraved characters on the matrix to produce an embossedcharacter on the paper dial. As the watchman reaches each station hetakes the key and passes it through a suitable opening in the side ofthe case, the shank of the key passing up over the pin, f and beingthereby guided to proper position. Then the key is pushed home it can beturned by the watchman and when turned the projecting flange, 9 of thekey engages the click-spring, thus arresting its movement so that whenthe key finally passes the spring a sufficient degree of force isexerted upon it to insure the production of a clear impression on thepaper dial. The pin, f operates to prevent interchanging the keys of oneclock with the keys of another, for in practice the pins are placed invarying positions on the various clocks and corresponding depressionsare drilled in the webs of the key.

My improved device is particularly advantageous owing to its simplicityand cheapness of construction, and on account of the further fact thatmeans areprovided for preventing the keys from being interchanged fromclock to clock.

I realize that considerable variation is possible in the details of thisconstruction without departing from the spirit of my invention;therefore I do not intend to limitmyself to the specific form hereinshown and described. 7

WVhat I claim as new and desire to secure by Letters Patent, is-

1. The combination with a matrix, of a key-guide opposed to the matrix,a key adapted to engage the key-guide and having a character adapted tocooperate with the matrix, a spring opposite the keyguide, said springbeing bent into a substantially S- shaped form, one end of which issuitably supported, the opposite end being adapted to engage a portionof said key.

2. The combination with a matrix, a plate opposite the matrix having aperforation through which a key can operate, a key-guide beneath theplate and adapted to receive a key having a character to engage thematrix, a spring beneath the plate and havin one end secured thereto,said spring being led first away from the key-guide in a

